By moving your money into the account, you have said it's with the intention of paying down some loans, this is not a bad thing.
The issue here however is, you have also shown your intention, by your detailed research, into purchasing another investment vehicle.
IMO this, and this is the crux of the post, reduces the strength of your hand when it comes to borrowing, and you seem to be focused on this venture.
If you are happy with your lot at that stage, then, commit to paying off vigorously.
Paying down the car loan is a no brainier in any circumstance where the interest rate is off the wall.
I borrowed once for a car, and it only ever be the once.