Not an accountant, but I believe if you’re working on a side-project you can expense a lot (essentially, the side project is just another service your company offers) and thus you can “expense” (not technically expensing because it’s paid by the company in the first place) a lot of stuff - hardware, cloud bills, software licenses, etc.
Agree with this. Contractor expenses are low. You can run a lot more through your biz if you want (travel, food, computers) but over the long term i'd say it\s 80-90% profit.