There are rental management tools like Stessa, Baselane, Innago, and many others that include income/expense tracking that handles all the accounting tasks and reporting you really need for rentals. 

It's a tool he made to evaluate deals on the BP Money Podcast and is available free to anyone!

Using your first property as collateral could help reduce the cash you need upfront, but it’s essential to weigh the risks and it's not really recommended specially if this will be your first.I recommend focusing on building reserves or seeking partnerships to fund flips.

Thank for your help Connect with a great property manager or use one of the free online tools to estimate rents.

I will use comp tools to appraise property value without the ADU to determine cost added by ADU.  

They argue that the first few years maintenance would be insignificant since the properties are renovated, and so you're essentially stashing that money away for the future maintenance needs. 

For me, this is a great risk management tools versus US investments. 

I think what you are describing is essentially a data center Build to suit perhaps? 

The PadSplit platform should be used as a resource/tool but please engage with the people in the organization.

So I will keep to me C4D's that get the job done, legally, well received, no DOS fears, just a dang good tool for the job right.