I have excellent credit (800+), excellent DTI, stable work history, and plenty of equity and am only asking for a 30% LTV cash out.

@Pete PerezReturn on Equity is an excellent metric for you to look at in this case.

In our experience, the #1 mistake landlords make when selecting a Property Management Company (PMC) is ASSUMING instead of CONFIRMING.

The answer to your question is heavily dependent on multiple factors such as being a good manager of things generally speaking, how well you do your tenant screening, how comfortable you are with bookkeeping (if you are going to do it yourself), if you have a good selection of service providers in the area etc. 

We now have an excellent handyman who provides detailed receipts and photos but most other service provides don't.

(must live in it first and hope to only live for a year before moving to a home for my partner and myself)Anyway I am trying to sort out an excel spreadsheet that has - a list of properties- what they are listed for- what I would like to get them for- rent- rate costs and extra expenses- loan repayments- monthly and yearly income- and ROII am just having a bit of trouble understanding how I work ROI out.My first example is 50k of my own money with a yearly return of $1872Do I do 1872/50000?

Whomever I select, I will for sure be coming to KC since the risk of more work is high. 

The investor is interested in the Darby, Upper Darby and West Philly market because of the low cost of entry, high rental rates and excellent appreciation.

Does anyone have or recommend any calculators (online or excel) for seeing numbers on rentals, BRRRRs, short-term, etc?

I admire how you put yourself out there to learn in the real world and talk about specifics instead of trying to do it all in Excel -- I think that's what many people miss.Siempre adelante!