Since you already had your first AR, then build your next one, it's a great hobby.
It might be more expensive at first because of the tools you have to get but if you get your gun parts at a lower price it won't be so bad.
I would like to warn you about the Colt brand, it could be expensive if you buy the parts at the regular prices.
I just built a Colt M16A2 upper on a Colt Match Target HBAR lower using all Colt parts and I spent more than buying a complete rifle.
I have been using and buying factory assembled ARs for more than 30 years but I got started building only this year.
I built my Colt Match Target HBAR lower for my rifle project and a mid-length gas system 16-inch barrel and Colt M4 upper for my 6721 middy carbine project.
I'll be building more in the future and will never go back to buying complete rifles.