Think of the rent you can charge as a value proposition: what does the resident get when renting from you?

I have seen a lot of investors get stuck with a Heloc that they opened up and due to a small mistake find out the bank cut their heloc limit in half or in some cases closed the account leaving them with a balance to be paid off before they could even finish a renovation project.Heloc rates are much higher right now versus a 30 Year cash out refinance by over 3-4% in some cases higher depending on credit score, CLTV, and loan size.

Thanks Ned, Short answer to explain it, I did not know they were around back then, just found out now when we are coming back, a little background, when I started in 2005, I was a child :) 28 years old and thought I knew it all, all, all :), did not know about hard money lending, only new about bank loans, and Home equity lines of credit, did not know where to find more money, since I did not have much, I would rely on what I could get from banks, loans, credit cards and was not always that great, it was a learning experience.....and Wholesalers, I did not know that even existed, everything I would find back then was already on the market and through a "friend" agent, MLS, FMLS and all those, nothing like what we have today.

Having a single CPA allows for consistency in tax strategies and communication.However, there are times when it’s beneficial to get a second opinion.

Ive started getting some momentum making contact and landing deals from our skip data , but one thing that needs to improve is my Buyers List looking to build buyers list in Houston, Tx any investors looking to network in the area or anywhere ! 

Credit score- the higher the best. 760-780+ generally gets best pricing for investment property loans with most lenders.

I would think that if the tenant is paying for the addition, they would want to have a minimum of a 5 year lease, if not a 10 year lease in place in order to pay for the improvements.As in any real estate investment it is risk reward, I think with the current market and a stable vet tenant, that if you can get a 5+ year lease, it would be worth it to let them expand.If you are worried about value, you could always talk to a commercial real estate appraiser.

Can any builders/developers share their experience getting started or which route is best to take in the current market?

If you want to go down a deep dark rabbit hole, and I don't want to get outside the scope of BiggerPockets, but look into "15 minute cities".

By using a service it enables you to create accountability and increase the likelihood of getting paid, while also using an automated platform to handle the monthly follow-ups for up to 6-7 years so you don't have to.