You can buy a lense adapter, and go looking for some cheap old lenses. I just bought two old Zenit lenses: Helios-44 (58mm) and Jupyter 37A (135mm) + single ada

You can buy a lense adapter, and go looking for some cheap old lenses. I just bought two old Zenit lenses: Helios-44 (58mm) and Jupyter 37A (135mm) + single adaptor, all for ~100 eur, and I'm pretty happy with them! I'm not sure if these exact lenses available where you live, but for sure there should be some options of nice old lenses you can buy for little money. UPD: I have x-t20