Mena has it right
"LI in RVs is still in its infant stage. You can buy ready made stuff but it's really expensive. DIY is cheaper but you need to research and be comfortable in what you know."
My take it depends on YOU individually
Remember when you ended up with a better, lower cost computer if you built it yourself? For some of us this stage of Li Battery development is just about the same thing. It's a wonderful time to play with new technology while learning new things. Like a kid with a new toy. A perfect fit for me
PS - Forgot to mention the IP Camera development stage another wonderful tool/toy and a technology that's moving VERY fast. Always something to learn while playing with new technology