The same applies to buying businesses whether it’s online businesses, plumbing companies, or professional services like a CPA rollup.

I commonly hear that permitting is not an issue unless I am touching plumbing or electrical but just to be safe and avoid any future liabilities, I am trying to understand it is even feasible to get the new rooms/garage permitted for their intended use.3.

For the first part of your question even if you were working with a realtor, I don't personally know many that have a true pulse on rehab costs and I wouldn't make any investment decisions based on their rehab cost projections.My suggestion would be to study how to evaluate the Big 6 rehab costs: roof, siding, windows, HVAC, electrical, and plumbing. 

The last two tax lien houses that I got and sold had major plumbing issues.

We are currently looking at a HUD home in Georgia - I have a couple of questions and can’t seem to find a definitive answer - The home is currently in the OO listing period - our plan would be to buy the home doing extensive renovations (the home is in a “Historical” area so renovations have to be approved) once completed we plan on living there full time - it could take ip to a year to complete or longer I don’t know  - as I see it the OO designation is to be the OO for a min of 12 months - is this after the home has been renovated or after you close on the home - though the house could probably technically be lived in now it does have some water and roof damage and needs complete redo of electrical and plumbing - for me to deem it safe - so not really livable by normal standards - but no way it would be livable in just a couple of months - any thoughts or an actual answer to the OO rules 

They are not experts in plumbing. 

Purchase price: $55,000 Cash invested: $110,000 Sale price: $205,000 This was a 1950 raised home that needed extensive foundation repairs as well as all plumbing, electrical and subflooring.

Does the 60% the condo-hotel takes include the HOA fees or utilities or replacement of furniture/repairs to the unit like plumbing or stuff like towels and sheets etc?

New HVAC, plumbing, electrical, floors, kitchen, baths & added a deck. 

There is a cinder block structure on it now that is basically a 1BR, 1BA shell with plumbing fixtures, but no kitchen.