Why not kit a shed out in garden and play about in there
Grinding spraying and what only knows going on in the bedroom you might find your self living in toby when ma and pa kick you out
Bolting on is fine mine went through mot a couple of weeks ago
You might find you will need to trim about 10mm off the edge of your angle to get the metal bumper to fit
Thats all i use a local place that fits side windows and sun roofs in vans and things the panels that get cut out he gives you for nowt just grind the paint off the edges the rest is already primed
Then what are you going to sell to buy a volvo?
Why not stick with the plan mot insure the atoz get your test passed and then take it from there
Get that test passed and gain some independence