number of images per accommodation

Unfortunately, there is currently no function to limit the number of images that a partner can upload. If he can upload as many pictures as he likes or doesn't have to delete old ones, the website gets bigger and some things work slower and slower. (backup or something) Also, the storage space is not endless. Or the administrator has to constantly monitor everything and delete a lot. But the partners will not like that either!
Thanks very much!
Manuel