This means, effectively that there is no 'fair' way to split up the cost of the energy delivered for the locomotive method of 'moving' that air or water/glycol mix.The other main hurdle here is that heat losses as the air or water/glycol etc mix is traveling are significant. 

I would recommend a mix of both that aligns with your plan, the money you are giving up earlier could be a tool or vice versa. 

I have read mixed reviews on investing in this market due to pro tenant system, high vacancy and very slow price appreciation.

Consider liquidity needs, inflation, and your risk tolerance in deciding the mix.

Are you looking for cash flow right away, appreciation over time, or a mix?

We see a good mix of flips and BRRRRs here - lots of deals where you can leverage your construction background like value-add opportunities through renovation.

I chose Oklahoma City, OK partially because I have a long term rental out there already - a quad that is a mix of long term and medium term units.

.), are there any particular upsides or downsides of purchasing all single bedroom units vs. a more traditional mix of units for a property that size? 

There are lots of options available from the mix of investment lenders.

Mixing MTRs and STRs can be a great strategy, but it does take some juggling.Switching to STRs in the summer is totally doable—you just need to plan ahead.