**Legality Varies**: The legality and accepted use of BOVs/BPOs can vary by state, with some states restricting or prohibiting their use[2][4].In summary, broker opinions of value can be a cost-effective and timely way to get a rough estimate of a commercial property's worth, but they have limitations in terms of accuracy and acceptability compared to a professional appraisal.

IMO you will further restrict your renter pool. 

This is what works for me: I stick to a well-planned direct mail marketing campaign and send mail to each of my listings at least once every month.

We want to understand how much loan do lendors provide for buying the land and do they have any restrictions for the loan like need to build in 1 or 2 years etc.

However, locally some places in PA are allowing ADU, but have restrictions that if you build one for a parent or a child, that once they leave it can NOT be rented to a non-relative. 

So there may be no actual restriction on TCO for residential, but because of the challenges of doing this for residential homeowners they may have internally decided to restrict it to commercial. 

Make sure you purchase something void of CC&R STR restrictions. 

You want a ratio of 1 to 1, anything higher is more restrictive and can mean you will get less money then you are after.  3.

Would you find a 55+ park to be too restrictive for a 1st time park buyer or would you say if other factors made sense this would be worth considering?

There are rental restrictions and rising crime.