My first question is do I pick a good, better, best system that costs from less to more $$ and do I justify the more expensive energy efficient system to grab a little higher rents since tenants will save money.

In addition lower rents will decrease the value of a property, not necessarily its appraised value, because no buyer will desire to pay retail for properties with reduced cash flow.

David A cost segregation study can be beneficial for properties under $400k by accelerating depreciation to reduce taxable income.

Do you think certain methods help reduce late payments?

After purchase the assessment office was given the survey and quickly reduced the acreage for taxation to 1.8 acres also. 

This resulted in longer times to re-rent and well as reducing the rental pool.

Bank of America’s business credit cards seem better, but I’d need to hit their Preferred Rewards status to reduce fees, which might be challenging.Amex: I like Amex’s reputation and services, but their outgoing wire fees are higher, which is a downside given how many wires I send.My ideal solution would be a business account with minimal wire transfer fees (especially outgoing wires) and a solid business credit card option, preferably with no foreign transaction fees.What would you recommend for someone like me who does a lot of outgoing wires and occasional foreign transactions?

They’ve been solid investments, with rising rents and property appreciation, but over the last 2 years, skyrocketing HOA fees and stagnant value growth have reduced cash flow.

Good tenants can significantly reduce vacancy rates, turnover costs, and maintenance expenses.Many property managers I know are quick to fill vacancies, often asking, "Do they meet the minimum requirements?"

The initial thought is you are probably charging too much if no one is interested, or your photos or description are bad.Four beds and only one bath probably reduces demand as well, that’s potentially a lot of people sharing one toilet.And it is winter - I’m in Buffalo, I hate listing rentals this time of year.