I know cost is a factor but think about overall functionality and does it do the 7-10 things you really need? 

While many will also create LLCs or other entities and perform other services, that is not their core function.

It’s a variable rate but the nice thing about using a Heloc is you can use it multiple times as it functions like revolving credit, ie similar to a credit card.

I don't understand how so many miss the most basic function of STR that it is Hospitality, and ignore the very simple, long founded and known principles of such.

I build it like any other home there's nothing special except for some of the extras we add in for functionality. we sell our inventory though. 

If you property is functionally obsolete like only has 1 bathroom, adding a bathroom would likely pencil out.  

What you need is the source-data, a programmer to build you an app based on this data, and a experienced developer to instruct the programmer on how the algorithms/functions should perform these actions so they are actually useful.

Roofs and 'lesser' critical home hardware like HVAC, AC, plumbing and non functioning lighting and electrical. 

The owner really wanted to sell to a business that could use the function room within the building.

It is possible to manage your properties with Turno, as it creates automatic cleaning projects, has problem report functionalities and so on.