I probably would not recommend breeding your mare, unless you are absolutely 100% certain the mare does not have DSLD. The problem with DSLD is that it does not usually show up in younger horses, but as the horse ages, the disease continues to advance.
The only way to be certain that a horse does not have DSLD is to breed the horse later in life, as the disease normally shows up by age 15.
I'm not saying this horse has DSLD, just that I would be concerned it does or may be developing it. Is the horse currently sound? As if it isn't sound, that would be a huge red flag. Unsoundness often develops prior to other symptoms or conformation changes in DSLD.
Breeding your horse can cost $5000 or more between vet visits, vaccinations, the after foaling check up and any additional vet fees if your foal gets an infection or needs veterinary attention after birth. It is actually much cheaper to buy a foal or even an in utero foal, with a better outcome. You won't lose your mare, possibly lose your foal or both.
I would have loved to breed my first mare, but she developed DSLD and I was forced to wait. I would have loved to breed my 2nd mare but she also had some issues. The 3rd and 4th mare I bought and sold. The 5th was a lease I returned. It wasn't until the 6th mare, that I finally felt I had a worthy horse.
It is only worth breeding the absolute best. Because DSLD is always a (eventual) death sentence, I would not even risk it. Wait and only breed the very very best, even if that means you have to find a different horse. I waited, saved up my money, and it was totally worth waiting for. I suggest you do the same.