Cracks & Bowing Plaster - Repair Question

[Aleksey F.]

Hello everyone,

Making my first offer on a property and a first 1st post here! 

This is a 1935 duplex that I will rent out. Having a tough time estimating the cost of plaster repair (cant bring a contractor until after closing in 30 days). Throughout the house I noticed 4-5 cracks and some paint peeling. None of the problem areas are in exterior walls, so I don't think moisture is a factor. My perfect scenario would be if these could be patched up without the need for demo replacing with sheetrock. So what is your opinion on how bad this is and fix required + cost ?

Small crack in wall:

Small crack in ceiling:

Bowing:

Large crack (~5 feet):

Peeling:

Peeling 2:

Best regards , Alex