The sales comparison approach is typically done for residential real estate and will be less appropriate and come in under value because there are no good comps, and even an appraisal using the income approach (unless the appraiser is trained to do more complex commercial appraisals) is probably not going to be the most accurate either because they typically use market cap rates and in this case you don’t have good comparable income properties to find the market cap for the analysis.  

The LLC would essentially serve as a business checking account to collect rental payments from your roommates/tenants and potential write-offs for expenses such as property repairs/maintenance.

@Austin TessMany lenders have a seasoning period (typically 6-12 months) before you can refinance.

Do you typically reevaluate your current returns based on the net equity you have in your properties?

The average company only survives for ten years, while even large companies typically last just 18 years.

.: I'll have to look into this I typically contribute the max to a IRA then do a backdoor conversion to a Roth IRA.

For us we all typically use 0% business credit cards to furnish the property which can amount to $40-$60k+ depending on how crazy you go. 

Yes, typically for accredited investors only (although they often accept up to 100 investors).I have seen a rare TIC based one and yes...more typically DST.

Rates can be very similar to those of conventional financing (Fannie/Freddie - full doc loans that you will need to prove income to get), but typically a little higher than conventional financing. 2nd - Networking and partnerships! 

Many houses that have gas only have 100 amp service vs the 200 amp that is typical of all electric homes.