Looking forward to get more familiar with the platform 

Completing the setup will likely lead to smoother operations and peace of mind in the long run.

Selling a hospitality property like this is a lot more valuable if you have a booking website, leads generated, upcoming bookings, etc.

This is the best platform as a starting point. 

BiggerPockets is an excellent platform for networking and establishing connections.

My top priority is having maximum flexibility with what I can invest in within my HSA, second priority is ease of use and convenience of the investing platform, third is minimizing any account, trading, or management fees charged by the HSA provider. 

Quote from @Isaac Watson: @Charles Perkins are these meetups on platforms like meetup.com?

A great alternative would be simply licensing or leveraging a different web forum platform that already has a mature mobile app available for and that BiggerPockets could simply redirect mobile users to when they open the site.

Some custodians may offer access to platforms with investment opportunities, as well.

You'll lose rent while property is vacant, and you'll probably have to do more repairs to attract a new tenant than you would to keep the current tenant.Is all that worth requiring a tenant to use one specific payment platform?