Some supras N/A 5 speed are around 10 to 14k ,Try some FC or FD , Some R32 GTR or maybe an R33 GTR
But you need tons of cash if u want to build a wangan car (i wanted to build one , but my budget was very short and my car wasn't good for wangan), If u can afford it and take the risk , go for it dude!
Cars that i own
1 - 1986 Toyota Corolla Levin Kouki GT-APEX (AE86) : Street legal drift car project (SR21DET Swap project)
3 - 1985 Toyota Corolla Levin Kouki GT-APEX (AE86) : Quick repair and sale