If you don't have an LLC set up and are using an umbrella policy to protect yourself from liability do you want a policy limit greater than or equal to the amount of equity you have in your properties or greater than or equal to the property values?

-Recommend the receptacles in the kitchen, bathrooms, and exterior are GFCI protected.

I am going to guess you are doing this for more not less control of your life so maintaining control of your cash would be essential for growth and protection against unforeseen conditions. 

You get the worst return on your cash but have the greatest protection against market turndowns in terms of the asset protection.

If the purchase was 100K and rehab is 40K and the ARV is 200,000 then there is plenty of equity to protect the investor.  

Offers asset protection if someone tries to sue

In addition, I use high quality (not $8) surge protection power strips on my computer, TV, etc.I do not bother though on my rentals. 

Courtney ClantonBuyers Protection GroupCustomer Service Representativehttps://ezo.bpgwi.com

I know some real estate investors that want to borrow money from me from rehabs or down payments on their projects, but I don't have the proper documents to protect my investments.

You need to cap the contribution ahead of time to protect your self.