I enjoy tenants turnover ever few years for the reason fair market rents tend to increase significantly year over year. 

They took tend to take longer to close..

Like you we had 3 teams of two door knockers  2 for safety one women one man.. and we door knocked every NOD in our 2 mil MSA  all to boil it down to if we were very lucky to get 2 to 3 deals a month.. now we were a little different I only would buy very high equity deals.. and we leased back .. because as you state 99% don't want to leave.. 

Although these platforms tend to accept bigger deals from sponsors with a lot of experience.

The clientele tends to skew old and stuffy. 

I tend to agree and don't think it will be an issue.

For these, costs tend to double across the board, especially for older buildings.

Also, for me 30+ bookings tend to be less profitable even though there are less vacancies.  

The drawback is you need to build trust and relationships upfront.Both have their place, but private money tends to offer more flexibility, while hard money is more structured and accessible if you lack personal connections.

None were a match for me personally and many were not a strategy I wanted or too speculative (such as opportunistic strategy which is the riskiest strategy or investing in tertiary markets which also tend to be the first to go belly up when there is trouble etc).You probably actually want to look at your operating agreement to see what rights you have to books and records, etc.