If this isn't ideal, then you would need to find a realtor that can help you with your comps in a timely fashion.

I am looking to utilize the line of credit in the smartest fashion, to be able to grow my investing career as quickly as possible.

Some people try to interpret the "execute" in an "executory fashion" (completed/closed/out),  but all lenders I know interpret it just as it seems....90 days before the FHA buyer and seller can sign the contract, not 90 days before closing. 

I’ll just have to do the old-fashioned way with spending more money or either seller financing if I want to save as much as capital as possible.

I bought my first investment property the old-fashioned way - with a deal found on the MLS with the help of a real estate broker.

Most plumbers I know can at least get the leak stopped that day in some fashion.

I wouldnt do it in an LLC you currently own,  Confirm with your lawyer of course but it seems to me that you should form a new entity that the two of you co-own in some fashion. 

We are now texting and calling reps, searching for them on Facebook as well as mailing our good ole fashion genuine letters to them.

I’m about 80% complete with my first flip and I’ll give you an idea of what the proper steps should be in the rehab process (some of these will vary depending on need) Read David Greenes book on long distance real estate investing he breaks everything down in great fashion!

One of the folks on there just went out and did it in impressive fashion, may give you some ideas.