I have used a hard money lender that will loan in 2nd position for the additional collateral to increase your loan amount on the subject property.

I am also making calls and looking for opportunities where a seller might consider seller financing or a subject-to arrangement if the bank owns the property.

There are many topics on BP on this subject that you can search.

For marketing, I don't think you should focus on what works the best because that is very subjective.

I have head senator Weinkowski speak on this subject and the rationale of the 15 year exemption.  

Most around my area and the ones I've been calling will only offer 70% occasionally 75% for investment properties and again these may be subject to commercial terms and rates with shorter draw periods.

You will likely need an LLC that will be used to hold the subject property. 

I’ve been researching subject tos and I just just wondering, does subject to benefit the seller in anyway other than getting the mortgage liability away from them?

If there's a hole, it may be a red flag.b) sensitivity analysis: I examine all the assumptions, and make sure I can live with the worst case scenarios.c) "Stall and see": if they are getting money over multiple years, and there is no penalty for investing later, I would usually wait so I get some real performance data, versus having to look at theoretical pro forma information.d) Recession stress test: I will not invest in anything, until I subject it to recession level stress and see if I can live with the result.

These "gator lenders" as he calls them, are over leveraging the property being bought "Subject To".