I bet the smart STR folks here will be quick to weigh in with suggestions. 

Quote from @Michael Santeusanio: Some investors line up funding first; others contract the deal and then secure financing.

If the STR is going great, you have equity and good income, you might be able to get someone to establish a business line or credit or loan for you that you could pay off with a cash out refi on the new property when you finish.

Having relationships at multiple banks or lenders can allow you to always have access to money, whether it is guidance lines, pre-approvals, Lines of credit, etc. 

For those of us running multiple LLCs and scaling portfolios, an interest-only revolving line that’s based on rents instead of income or DTI is basically a business line of credit secured by the asset.

The most important rule is to have the cash flow of the new property be able to pay all its expenses, mortgage, AND the line of credit back.

Bottom line - best to pay your taxes and not have your inheritance subjected to all of this, right?

I thought that Erie had it and it was called Underground Service Line Coverage.

Ill bet there's a FB group for machinist, a good chance the forums also have FB.

The same needs to be done for HVAC, plumbing, sewer lines, windows, paint/siding, etc.