What do you mean by lease? You can rent on AWS or some other services cheaper. Try google colab which has free gpus (t4 gpus I guess) but stops every 12 hrs and can run only 1 instance per account.
BTW, any plans for these softwares to be written for ASICs to make them more faster?
I can only pay for hosting with crypto which AWS does not support, and I use Google Colab is, well,
awkward to make it work for non-Python projects like Bitcrack.
ASICs that are used in bitcoin miners cannot be programmed to run private key crackers because the mining logic is hard coded into the ICs (integrated circuits) inside the ASICs. So you actually have to make a custom ASIC that only makes a table of all RIPEMD160 hashes and searches it for a particular address in order to make it work with a cracker like Bitcrack.