i'm not but i do get to work faster than when i drive the corolla verso.
was going for a 500 bhp build but not 100% sure that that will go ahead.
i think if you wanting to do a turbo build then save up plenty of money to get it done right, there are still loads of things i did not list, like boost controller, turbo timer, oil catch tank, and more
you have a few other options,
1g gte engine swap, mk3 supra double turbo with 210 basic but easy up and over 300 with a boost controller, i just sold my one complete but they do come up from time to time on ebay,
2jz gte engine swap, supra mk4, twin turbo with 350 bhp, easy to pust higher,
2jz from a gs300 or other toyota/lexus engine and then a turbo kit for more power.
v8 monster like a guy in the usa, took a corvet engine and gearbox and shoe horned it into his is300,
but what ever you do think that this will cost a bit to fit and fix, make sure you have the funds to finnish the job as if you have to sell you loose about half of the costs, know of one or 2 that hit this wall when getting all the bits ready for a install.