Evolu,
It's really hard to be specific in response to your query. All such investments are 'situational' i.e there are a multitude of factors which come into play in making your decision as to what to buy and what not to buy.
There are, however, a few definites with regard to Romania
The first thing to do is to narrow down your search area. Pick a city/area where you will be able to have easy access. For example fly into Budapest (Hungary) and you have the entire western border area within your reach. Fly over London and you can reach Tirgu Mures which put's one of Autos favourite places, Cluj, on your doorstep. Stay away from Bucharest! You'll be eaten alive! Even after all these years and speaking the language I still always have to deal with a 'situation' when I visit there albeit as simple as a smart-assed taxi driver with a 'broken' metre asking me to pay him what I think the journey was "worth".
Once you've picked your area then the really hard work starts. With regard to your interest in commercial properties then I have a rule I stick to, rigidly. If it doesn't yield 9% absolute minimum then it's not to be. The only exception to this would be a freehold property on it's own site where there would be a good chance of gaining planning for a block of apartments, for example. In otherwords the site value will soon become more valuable than the premises. Such opportunities will be very rare. Romanians are not idiots! They are well tuned in to the 'price'. That said it has NOT been my experience that (with the exception of Bucharest) they will try and rip you off, particularly if you can demonstrate that you know the local prices and don't suffer fools gladly. Rather you will find them less willing to haggle with you on the price. Hey! Your foreign, you're loaded so why would you NOT pay top dollar? You'll have to find your own way 'round that one. My response would be a more polite version of the two fingers....
Usually I'd shrug my shoulders and walk away at a gross yield of less than 10%. I've come across a few gems, however, and actually own a couple of commercial properties where the yield is 15% on one and just over 20% on the other (after renovation costs). That said I was exceptionally lucky and in the right place at the right time to buy them. Note these opportunities occured just twice in 5 years. By the way there is absolutely nothing glamourous about either property. They are shops, not banks or ritzy offices but the yields are there.
10 -14% yields would be a more achievable goal for you but only after alot of due dilligence. You're simply NOT going to walk off the plane and have these things land in your lap. I'd recommend a MINIMUM of 6 months of reasonably frequent trips (say once to twice a month) to your chosen location before commiting yourself.
The next thing, and definitely THE most important thing to do is to check title. You'll need a good specialist property lawyer to this for you. I pay my lawyer 80 Euros an hour to do this for me which is a bloody kings ransom in Romania but she is worth her weight in gold. More times than I care to remember she has really, really saved my bacon. Her advice is gospel as far as I'm concerned. She's bullet-proof.
By the way title problems don't only relate to who owns the land. Often I've bid on a property where the owner definitely owned it but other strictures have appeared which meant he couldn't legally close the sale to me so I had to, sometimes reluctantly, walk away. Your head (and your lawyers head) must always rule your heart however painful it may be. If you hear about laws L112 or L150 in relation to a property then more often than not you'll be walking away, especially L150. If you want a more detailed description as to why then PM me. To long-winded to get into here.
The best thing you can do is INFORM yourself, and seriously. If you want to post any queries here then I'll deal with them as best I can. Also it would allow Auto to add his obviously indepth knowledge to the equation but probably a new thread needs to be started on this subject as this discussion is more than straying from the original title of this thread. By the way I have no personal connection to Auto. In fact I took umbridge at some of his earlier comments, but I've come to the conclusion that he can be trusted to advise in a pragmatic and impartial way. Alot of what he say's, particularly about Romania, is very pertinent.
Another reason for me suggesting posting in this public forum, rather than by PM, is that I'm no out-and-out expert and don't claim to be. Believe me I've made mistakes out here, big and small, and I'm learning all the time as many of you will be too in the coming years. If I don't have an answer to your query then others likely will. This is a great board to 'sound-out' on.
Anybody want to split off this discussion into a seperate thread with a meaningful title?
Best of luck with it.