Looking to get into a Supra..

[Medeiro]

I've been a BMW owner since 07. I have had a 335i sedan and im currently in a 335i coupe and im happy with the BiTurbo Charged I6, I have modded my 335i moderately; ecu tune and intake but any further tunes; turbo upgrade are not released and will probably kill my pockets. Basically Im looking to get into a Supra TT MKIV model only, hoping it will cost less money to buy and mod. I have spent 5000 on rims 1000 in ecu tunes, 400 on intake, 1000 on exterior mod and 500 on interior mods. The car cost 750 a month and I put 5000 down. The cost is becoming ridicules for only 380whp and im looking to get out after the lease is up. This car is strictly a weekend driver.
The MKIV has been a favorite of mine since i was a little one. I am also interested my the crazy WHP cars i see around the internet. My question is how much am i looking at to buy a MKIV and modify it with the standard mods; FMIC, bigger TTs, Larger DPs ect.?