Great result pingin. Having two pairs of trousers with one jacket is always a good idea, the trousers will wear out faster than the jacket in any suit.
A suggestion, after you wear the suit, hang it up in the bathroom while you are having a shower. It's much better for the fabric than dry cleaning. If you have, or know someone with a garment steamer all the better.
Who knows, this could be the start of a daring new wardrobe.
And Debenhams normally have a rail or two of clothes greatly reduced in price. I have picked up the odd shirt or trousers pretty cheaply. Just make sure you need it and it fits, not just that it is cheap.
A good tip there. Yes, I was surprised by Debenhams, because I'd always thought of them as being very expensive. As for a new wardrobe, the young woman in the shop even said I looked 'dapper'! I've been called many things before but never dapper. I must say it's a nice feeling to dress up in new clothes. I had let things go over the last few years.