Others are just old, not updated for long, some broken stuff inside and no inhabited.

Read the fine print of the warranty you choose to ensure there’s not a time period you have to wait after purchasing the warranty and if they’ll replace something that’s a) not broken just old or b) only requires parts not a replacement. 

Would YOU pay the bill if her bedroom window was broken and she left the A/C on high to keep the place cool and didn't report the issue to you for a month?

After you have a good grip of what you want to do, consider an upgrade to a CRM.

For the most part I really just had my spreadsheets broken up into five categories: Rent, Utilities, Mileage, expenses and appliances.

In a little more than a year, we've put 100k into upgrades and added $500k in value on our original $300 investment.  

The roof will not get an accelerated schedule, however having a cost and square footage broken out will extremely useful in the case of damage. 

If it’s one room, no problem, but if you’re adding multiple rooms, you may be in for a service upgrade which adds $2K to the price tag.

Any benefit from the investment must be to your SDIRA and not to you.Example: I'm doing a SDIRA flip in broken arrow Oklahoma.

Purchase price: $98,000 Cash invested: $1,000 Sale price: $145,000 This property was bought in an area where the property didn't need any upgrades or repairs, so I sold it in the same condition I bought it in.