They mentioned that this is something that they informed the previous landlord about and they flat out said that they wouldn't fix it. 

I have a property that I purchased in LA county that has a ~12,500 sq/ft of flat land (12,500 Sq ft lot) with one existing primary residence (1200 Sq/Ft)I hired a architect to design an ADU (3bed/2ba, 1200 Sq/ft) and Addition (3 bed/2 ba, 1200 sq/ft) to the main home. 

why not buy a 2 flat?

Sometimes it is a flat rate or its a percentage rate.

But your strategy to bake in all your profits in the lot is only going to work with an uneducated buyer.Best of luck

Though they have remained relatively flat since the Fed raised interest rates, and for that reason.Labor costs too, are likely going to be sticky, more so, in fact, than goods/materials.

That said, for me 60 days notice does nothing for me since I won't advertise or try to show the unit until its vacant and prepped.My recommendation is to discuss with them and if you are honestly aggrieved by the lack of notice and it impacts you discuss a flat fee deduction from the security deposit.

We have a minimum $300/month cash flow after debt service to consider a deal and watch for $400-500 as a preferred return.I amortize HVAC repairs over 10 years and bake that into every SFH, about $8000/10yr/12mo = $65 per month.

So, typically a landlord will want to pay those directly and either bake the cost into the rent or bill a tenant back if the bill is based on usage like a water bill.

In these situations it's important to bake the cost of the heat into the rent.