So, what is my most preferred to least preferred, it all comes down to cost of capital.  

Don't look for lowest rate, look for lowest cost on fees as you will either refinance out of that loan or sell- the prepay will hit you on the back of the head like a cinderblock wall.

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

You may be able to see if a retailer still sells the 2024 version.If you can't get the one time purchase, you would need to see if the cost is beneficial.For real estate -  Quickbooks desktop > Quickbooks online because you can set up multiple entities within quickbooks desktop and not pay an additional cost per entity that Quickbooks online would charge you.Best of luck! 

The cleaning and repairs cost a conservative $2,000 because you did all the work yourself.

Three Months ago, low to mid 6's were available.Rates are going to continually fluctuate but if you have a way to earn 10+% on your capital, the TIME you are not using it is going to cost you way more than the extra .5% per year will.You are walking over dollars to save pennies if you are waiting for the perfect rate, half of the people who held out on getting mid 6's were waiting for high 5's.

For example, should we focus on acquiring one high-quality property in a strong market, or would it make more sense to spread the investment across multiple lower-cost units in emerging areas?

I also suspect inflation will drive continued migration to lower cost of living / lower tax states.  

If you are looking to buy in PA, its possible you can qualify for PHA KFIT program that gives you a 5% closing cost forgivable loan.

Imagine if it cost 1000 to send out 50 letters but half of them responded and half of those wanted an offer and half of those accepted an offer and half of those closed and half of those resold for a net 50k.