For example if rent is $2,500, you would expect total gross income of 7,500/month if my criteria is 3x income?

It should go without saying, but I do understand when you're new to real estate expectations can be out of line with reality --- if you finance 100% of a deal you will not see any money out of the deal for many years and will be putting money in for many years.

I would expect they would take a higher revenue percentage.

It takes longer than expected when doing most of the renovation yourself.

Quote from @Andrew Steffens: I think going into an STR purchase with reasonable expectations of cashflow in this current market and rate environment is admirable. 

If renters find out your utility costs are high, they will expect a lower rent to balance it out.

•Turnkey is viable but expect to pay a premium.

Otherwise, you will have to explain the large deposit and possibly the source of the funds to buy the crypto.You can expect to need about 20 percent of the overall costs of the purchase and rehab.

While dealing with all sorts of people, and dealing with lease violators, are all part of owning/managing properties, YOU set the tone for how you will be treated and how your tenants are expected to behave. 

There is no general rule of thumb but you can expect it to be in the range you have listed above.