With HML will I need to liquidate and have money in my business account or will they accepted the LOC and cash?

I have seen a lot of flippers in my area lose money, or not make much,  because they inflated the ARV and/or didn't account for market changes over time. 

You should then connect with an agent to get access to the MLS and then reach out to a lender to see how much you can qualify to purchase.If you currently have a CPA/accountant - you may want to reach out to him/her with questions prior to the purchase.

I have consistently made annual ROI of 58.44% on my investments with him.

Assuming about $1000 for insurance and 10% gross rents for management, the property only cash flows $900 a year without any CAPEX or vacancy losses...because annualized utilities for this year will be $9500. 

You will also need to account for projected capex, vacancy and property management including leaseup.

After speaking to him, I was informed that one of the family business accounts was closed due to suspicious activity.

Primarily I’m looking for any tips, references, recommendations on legal and accounting, management software, LLC setup for each property (legalzoom?)

Please speak with your accountant if you have questions about what types of home improvements qualify.IRS publication 936 explains how the home mortgage interest deduction works.

Those expenses are non-deductible from the get-go.To mitigate the loss of deduction, you can ask your employer to start picking up the cost or have them reimburse you under an accountable plan.