Most start by analyzing deals and forget the fundamentals of every business, like getting a Tax ID, bank account later, Business Credit cards, and lines of credit.

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

Something that will work in one market will not work well in another market due to maybe oversaturation, consumers, and anything else you can name.  

A safe baseline is 5%–10% for vacancy, with C class properties often leaning toward the higher end due to more transient tenant populations.As for maintenance, the percentages they’re quoting—2% for B class and 7.5% for C class—are on the optimistic side, especially for long-term projections.

I have a new-construction SFR property under contract, and the seller disclosed that there had been heavy metal contamination in the soil due to mining activity many years ago.

Why another for taxes?

Is your DSCR ratio greater than 1-meaning are you cash flowing (according to the lender's criteria of mortgage, property taxes and insurance (and HOA) if applicable).

That’s the key benefit.As for the cost segregation study, whether or not it makes sense really depends on your tax situation.

You usually pay less in taxes and you build your portfolio much quicker than taking that money out. 

In my market most of the experienced investors are not buying to buy and hold due to the cash flow issue.