I would suggest to check these things out before an offer or while under due diligence before the contract goes hard.I was under the impression he got it to rent primarily.

You need to learn to be an expert in some source of stress at finding, filtering for (a data source tool like propstream.com) or buying from a data vender who is good. 

Check with other PMs in your  area to get a relevant percentage. 

Hey @Ana Mills, this ultimately depends on what your current portfolio looks like, your entity structure, and your plans to scale or not.If you have a few STRs and no plans to grow, it's beneficial to have separate bank accounts and credit cards for each property.If you plan to scale to 10+ properties and hold each property within it's own entity, maybe just a checking account per entity and keep some credit cards at the holding company level. 

Go to a local realtor next time the appeal process is open and ask them to do a CMA on your place and use that data for your evidence when appealing with the county.

Research the market, use data analysis tools, build a team with experienced professionals, and practice deal analysis.

Be sure to check out the free tools BP provides to help analyze deals you may have and also market insights.

@Jeremy HartwigYou are missing a lot of important data, such as median income of the area, rent comps in the area, what current values are.You are buying on actuals, but in many markets that have low supply and have a lot of demand, it makes it difficult buy based on actuals.

A lender will use market data, conservative comps, and always side on the fence of "what if" - as in, what if they have to default you and take over the property?

A lot of my clients on the listing side will check mark they are willing to pay a buyers agent but not disclose the amount.