Other than state laws (if any) and a general concern that excessive skips may conceal and postpone losses, I'm unaware of any limits on the number of skips you can allow. The best example of this service is the "school teacher loan" & that's been around for decades.
Your biggest limitation may be calculation support. Since these are probably closed end consumer credits, you need to be able to compute an accurate payment schedule, FC, and APR. Skipping due dates rarely entitles the consumer to skip the accrual of interest. Accordingly, the TOP, FC, payment schedule & APR (usually) will change when you schedule "skips."
Entitlement is the controlling factor here. If the note says the teacher doesn't have to make payments during June, July and August, then you must compute & disclose accordingly. If, on the other hand, the note permits the consumer to skip payments optionally, then the skips should be ignored unless there is some kind of side agreement.