Moreover, the disadvantage of the HELOC is it can have a low starting interest rate, with a variable monthly rate based on the outstanding balance, vice if you have a fixed rate loan when you refinance. 

Any advantages or disadvantages to each method?

It is about finding a handful of serious capable buyers.I PURPOSELY do not want many buyers because the more buyers you have the more time wasters on your list and the more issues you will face in the future.Most people think that there is no disadvantage when it comes to adding more buyers.The more buyers you have on your list the more chances you have deals will fall through, and failed closings.You just need 16 (or so) buyers with capital ready and a genuine hunger for discounted off market properties.Focus on quality here, not quantity

But, a party cannot be excused from performance merely because performance may prove difficult, burdensome or economically disadvantageous.

In our market this puts you at a disadvantage since buyer agents are going to try and avoid your listing, and sell a home to their buyers where they can collect 3% on the same priced home.  

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I would also tell them that after you complete the inspection together, you will contact your accountant to transfer funds from your security deposit account and it will be mailed to them.This accomplishes 2 things, it lets them know ahead of time not to expect an exchange of money at the transfer and it also buys you a little time if there are problems in order for you to figure out what to do next.If you don't have a move-in inspection form to compare the "then and now" property conditions, you are at a severe disadvantage.

I am wondering this because i see everywhere grounded manufactured homes that rent for similar prices as the actual homes with much lower purchase cost, and it occurs to me are there any real disadvantages?

Tax advantages and disadvantages to holding a business in an LLC or real estate property in an LLC.

A big disadvantage of partnership to consider is the possibility of disagreements over the general direction of the business.