Hey Tim! Congrats on jumping in! I think that buy and hold is a great strategy. If your goals are looking at both short and long term rentals, I would suggest that you make sure that any deal that you buy will produce cashflow for both lease types. If STR gets shut down for any reason, you need to be able to rent LTR and still cashflow.
You mentioned that you will be paying all cash, but I would also perform a DSCR (Debt Service Coverage Ratio) calculation assuming that you will have some sort of debt on the property, just in case your plans change and you want to pull your cash out through a refi to purchase more properties.
If the property doesn't produce at least a 1.25 DSCR, I would not buy it. You can calculate the DSCR by taking the Net Operarting Income (NOI = Annual rent amount minus taxes, insurance & HOA dues) divided by the annual principal & interest payment. For example, if rent is $1300, taxes are $2000 and insurance is $800, and P&I payment is $650, the calculation would look like this:
$1300 x 12 months = $15600
Minus $2000 taxes = $13600
Minus $800 insurance = $12800 this is your NOI (Net Operating Income)
Divided by annual P&I payment ($650 x 12 = $7800)
NOI of $12800 / $7800 = 1.65 DSCR (Anything above 1.25 is great)
I hope this helps, let me know if you have any additional questions!