Nice Titanium! congrats on the new setup
If your rig is set up for 50 amp and the front vent is wired for a second A/C,... Do it... . I put the second A/C on my 36' (Toyhauler... really a 28' living area) trailer . . A Regular 13. 5K BTU.
I went to Monument Valley and in 100 degree heat, The 15K Ducted unit was not able to handle it. The heat in the trailer would slowly climb to what it was outside... . My 5500 Gen is able to run both A/C's on low and is now very comfortable.
I don't know about the Titanium trailers, but on mine, there was no insulation under the floor where the bathroom and bedroom (Storage compartment roof) is and the generator compartment had no insulation above it... . seek out where heat can get in... like another place, The pantry next to the fridge, it is not as deep to the wall... thats because the Fridge vent is behind it... . No insulation there either. I used 2" Foam block in 4' X 8' sheets... needed 2 of them... They relate to about R-10 value... .