I was planning on assigning this to an end buyer that I have lined up.

We're planning to upgrade a large kitchen (repainting cabinets, new hardware, and new countertops).

This is absolutely a question for your insurance provider.

Besides buying proper house liability insurance and umbrella insurance, how else can I protect my assets against potential lawsuits and such?

There's < 2 months of seasoning for the purchase, cash into the deal is ~$975k w/o rehab (minimal planned so far - turnkey), purchased the property for 35-40% below assessed value, 825+ FICO, and would optimally like to pull out $975K-$1.15M of equity.Main scenarios we've thought of to accomplish this are: 1) structure sale of property from SMLLC to self and secure 30-year new purchase financing on deal (unsure if legal and tax implications if above initial cost basis)2) delayed financing (LTV restrictions a concern)3) cash out refi (seasoning concerns)4) DSCR (seasoning and rate competitiveness concerns)5) one of the above plus a HELOC, personal loan, etc.?

I was also notified insurance is almost doubling... 

Drafted a plan, gathered estimates, created a budget, put together DTI sheets, even got an "as-built" appraisal, and also have it in a permit status at the Local Building and safety office.Then I started to look into the construction loan and the permanent financing....to do it myself, and not through a builder.I soon realized that there are sooo many companies out there that want to try to help...but cant  (some of them were even on this network of people):  don't have builds on record, won't allow for owner-built homes, my credit is less than 680, while carrying the construction loan, there may be a point at the end where because i have my rental house while building that it become hard to pay, and  I can't pull out a private loan to help start process because my credit cards balances are horrible...and my "business" has no show of income.So, now we are here in the present time....   

I borrowed an underwriting model from a Real Estate Private Equity professional and it seems a little too complicated for what I am doing now and what I plan to do in the future.

I plan to do house hacking.

This experience reinforced the value of strategic planning, efficient execution, and the potential of low-cost improvements in real estate investments.