Part of my calculations does figure in vacancy, repairs, and capital expenses.  

This calculation has probably now changed this year (versus a few years ago) when these services started cracking down on "sharing" which would affect STRs - I think its a big value-add to provide now versus in the past because of this

We run calculators on what you can expect for expenses beyond your mortgage, I don’t like surprises.

Furthermore, since these are turnkey companies and praise themselves on their renovations, the B class turnkey is using only 2% of rent (which averages around $1500/pm) for maintenance, and the C Class turnkey is using 7.5% of rent (avg about $1000/pm) in their calculations.

It's chalked full of information, calculations, and advice.

Have you calculated your monthly appreciation?  

.- Analyze Properties Remotely: Use tools like BiggerPockets calculators to evaluate deals.

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

,Buying, renovating, and selling is a great strategy, but here are a few things to consider:Start with the Numbers: Make sure you know your ARV (After Repair Value) and work backward to calculate your budget, including purchase, renovation, holding, and selling costs.Financing Blindspots: Even if you’re buying in cash, plan for potential delays or overruns in renovation costs.

Use a blended rate calculator to see what is more cost efficient.