She should definitely look into vouchers which they very well may qualify for, based on their income - the limit is higher than you may think. Also look for in-home providers. In that area you can find some providers for under $300 per week.
https://www.checkccmd.org/ - search by zip code, gives licensing inspection history
https://locate.marylandfamilynetwork.org/Family/login - search on a map for providers, they even have cost information for some as well as whether they accept vouchers.
Both the websites above will tell you the provider's Excel's rating (1-5, 5 is the highest quality rating, not all providers participate but those that take vouchers have to)