Both the agent and insurance company.

Can anyone give me any input on any or all of these companies?

Everything should still be done through a title company and you own the home - so you can sell it at anytime and keep any monies if greater than what you have left on the loan

If you have the cash, proof of funds is easy: Screenshot a bank balance or provide a recent bank statement.If you have a legitimate hard money lender who has underwritten the deal and confirmed you have the down payment and cash to close, they should be able to provide you a letter stating exactly that.If you have neither, then you have no business making an offer in bad faith and trying to tie up the seller's property.Also (and this is crucial and a common rookie mistake) - Don't send a "cash" offer to the title company and then neglect to tell them about your hard money lender.

@Season Price Usually, when we are searching for lenders, title companies, plumbers, etc. it's best to ask other investors in your market who they use.

I have a question regarding the address for an LLC my wife and I just launched to serve as the property management company of our current and future homes.We are preparing to rent our current home to our first tenant and move into a new home.

The work I do is for a waterslide company and they don’t report anything, and I cut grass as well while being a full time college student.

Do property management companies need a real estate license? 

I am planning to buy a land and build a cabin - any reputable builder someone can recommend. extra points, if you have used them and can share a bit more details

Assuming you get a management company to look after the properties (since i would be out-of-state investing).