You could go to Toyota get some sheets printed off and priced I hate the VAT add on as in it's £10+vat just tell me the bastard full price! They all do it you get a price over the phone then get there and it's not the same price. Be careful of that.
Get your mates round and axe it down lol or buy a car cover or you could always adopt a few cats smother the tree will Felix what size is the tree any pics haha
You don't need a bc but it can make a difference just say you set your actuator up 0.8 then you set the bc to 1 bar when you build up to high revs the boost will drop from the actuator but the bc will pick it back up. What ecu?