Which is the best depends on your goals and how you want to design your deals.

Will depend on several factors like the type of property, type of tenants, your risk tolerance, other assets you own, your estate planning, laws where the property is located, etc.

Will really depend on the are you're in .

HELOC on an investment property is good, Depending on your situation.

If you take 3x income, and minimum 600 credit score you do that with everyone, not pop it on them after the fact.   

Additionally, this structure eliminates the need for active management, as the real estate assets within the DST are managed by the sponsoring entity.As an investor your level of activity would include collecting monthly distributions, receive quarterly reports on investment, file taxes annually and exchange DST year 7-10 years (sometimes shorter depending on the market).

Quote from @Ryan Duphorn: It depends.

Depending on your desired investment return and path, you can then structure your deal.

I think MTR tenants could be ok with this and it really depends on your business and how you plan to mitigate risk.We collect rent through our property management system Hostfully.

It depends upon the highest and best use, imo.