TI versus IUI

Can anyone share there experiences with moving to IUI? We’ve been doing letrozole with trigger, timed intercourse and progesterone for the last two cycles but I kind of want to move on to IUI next cycle. My hubby still thinks we should just try “naturally.” He still thinks we can get pregnant on our own. We have a 4 year old that was conceived naturally, but we’ve been trying over 2 years for #2. In that time we’ve had 1 chemical pregnancy. Everything is good on his end, and I have endo that was removed in a lap surgery back in January, with a history of some anovulatory cycles and low progesterone. This cycle didn’t work so I’ll be waiting for my period and going in for a baseline ultrasound where I plan to ask the doctor about more info on IUI but I would love to hear others experiences. Are the chances higher with IUI or about the same with TI? Would it make more sense to try a few more cycles of TI?