Wait why is renting a GPU in the cloud not a solution? You can even try multiple options and see which ones are capable enough for your use case.
Look into some barebones cloud GPU services, for example Lambda Labs which is significantly cheaper than AWS/GCP but offers basically nothing besides the machine with a GPU. You could even try something like Vast in which people rent out their personal GPU machines for cheap. Not something I'd use for uhhh...basically anything corporate, but for a personal project with no data security or uptime issues it would probably work great.
Look into some barebones cloud GPU services, for example Lambda Labs which is significantly cheaper than AWS/GCP but offers basically nothing besides the machine with a GPU. You could even try something like Vast in which people rent out their personal GPU machines for cheap. Not something I'd use for uhhh...basically anything corporate, but for a personal project with no data security or uptime issues it would probably work great.