They are very efficient as long as they are in a heated space.

Is there a faster more efficient way to do this ?

The 3148 NE side has a vacant efficiency (bedroom, kitchen, bath) on the first floor and a vacant 1-bedroom on the second floor.

Markets are efficient and all great investments eventually get crowded with people seeking yields.

Feel free to check it out for yourselves as either an investment or to just help me understand the ways to run these numbers more accurately and efficiently. 

That is not to emphasize day one cash-flow, for us it's simply a function of being efficient and timely with how we operate.  

The idea being we can improve everyone’s efficiency by not repeating neighborhoods too frequently.  

I eventually learned unique efficiencies that really helped me out as a landlord.You see, a property manager cannot be as creative as a self-managing landlord because they are constrained by company policy and what the owners want.

Tip: The Inflation Reduction Act provides rebates of $2,000 to $8,000 per unit for energy efficiency upgrades starting in 2023.

Traditional water heaters have become a lot more efficient and insulated, they're virtually trouble free, and that's what I would go with for a vacation home.