In either event, the license allows them to advise, consult the owner/seller, but in no way permits them to withhold verified offers.  

With the property we were looking at it would be a basement conversion, so with the same search it looks like we would have to permit for that.If anyone knows of a loophole for the RV, I would be all ears!

The city has a lot of restrictions and requires a licensed technician and permits for everything you do.

I'm thinking that your numbers and those of other respondents doesn't include any soft costs (design, permits, utilities to the parcel, etc).  

Do it by permit/professional in case the place burns down.

That doesn't include design, or permits, I'm up to about $16k for those items. 

I don't see how the factory can be in production by 2021 if you take into account design, permitting, site prep, construction etc.

[For example, some homeowners associations may not permit you to house hack.]These are the additional questions that come to mind.

I currently have a STR permit for my primary residence but am thinking of moving and purchasing another home.

Last July, actually just about exactly a year ago, I had a roof leak.Apparently the tar joint on the high side of my swamp cooler cracked and permitted the water to enter.