There is a difference in playing home and home and bringing in a guarantee. And, to an extent I think that fact is being clouded here based on some of the comments I see.
First of all, UL isn't going to pay $100k to buy anyone. UCLA and Kansas don't pay that kind of money.
The teams you CAN get to come to the Dome for a GUARANTEE are probably limited to the SWAC, SLC and maybe Atlantic Sun and MEAC. No one else is coming for a guarantee.
In order to play home and home non conference as we are doing with Tech, McNeese and next year, Pepperdine,
1. Someone has to agree to play you non conference home and home.
2. The dates need to work out (more on that in a minute)
3. You have do come to an agreement when the series will start...home or road. (The possibility of playing twice in the same season exists, but doesn't happen often.) And, obviously, both coaches are trying to balance their home and away schedule..
4. Because of budget, it's preferable the home and home be against a team that you can bus to (this has changed in the last few years because of (more) budget cuts.) That's not in stone.
5. In a perfect world, your home plus neutral site games is greater than or equal to your pure road games. (Balancing the schedule.)
Now, let me address the date situation and we really don't talk about this a lot.
UL is the only school in the Sun Belt and the only one in Louisiana that I can think of that doesn't have total control over their playing dates. Because the Cajundome is a multi=purpose facility, there are only so many dates available. Those dates have to be turned into the Dome well ahead of time and once they are, there's no changing them because the Dome is going to schedule other events. That makes matching up dates with potential opponents even harder and makes it harder to get home games in non conference. Of course, we all know what happened last year with the unavailability of the Cajundome for the CIT.
All of that goes into scheduling.
Most teams will play home and home if they believe they have a reasonable chance of winning at your place. Marlin does have a reputation of being a good coach and that does, in part, make it tougher. Schools in leagues considered better than the Sun Belt really don't want to take a loss against a Sun Belt School, especially in the power six (I add the Big East).
Teams not wanting to play us at the Cajundome isn't new. Jessie had a helluva time trying to get non conference home games as well.
Marty's philosophy was he would play anyone who was willing to return the visit. Most of those series started on the road. Of course, Marty was able to buy games back then as well.