This should be much higher in the comments. If you're spending $1000/mo on hosting a SaaS you are very successful in my book. Margins on a SaaS could be around

This should be much higher in the comments. If you're spending $1000/mo on hosting a SaaS you are very successful in my book. Margins on a SaaS could be around 80% which means you may have MRR of $5000. You should be building your SaaS out professionally and not using hobby/gaming PC parts. It might be a fun project but if you want growth, I'd advise focusing on the SaaS and not on the metal and plastic it runs on, outsource that. Co-location costs are probably $100-300/month. So if you have an LLC you can purchase actual servers, write them off as a biz expense and let a colo provider deal with the power, networking, cooling, etc. of running a data center. They might have other services that you could leverage as you grow.