Good morning RockSolid,
A question first please;
Will you be cleaning the new apartments AND the 'old' ones as they move out? The reason that I ask is, cleaning the old ones may be somewhat of a different animal. Instead of just doing a construction clean up on the new ones the old ones may require a more 'deeper' cleaning; wall spots, spills and stains on any carpet, cleaning appliances that have been used, etc. Thus taking more time per apartment.
Stripping and refinishing VCT (3 to 4 coats of finish) can be done at approximately 500 sq ft per hour effectively,if it is taking you more time then improvement is needed, and includes cleaning up after, I.e. Baseboards, etc.
Pricing is always relative to many things; competition, location, economy, costs, union job, etc. Any choice in pricing that you use will be your decision, my information is only a suggestion.
In urban and close suburban areas the pricing is usually a bit higher; stripping and refinishing-$.23 to $.26 per sq ft. Carpet cleaning (hot water extraction method-best); $.11 to $.15 per sq ft.
Window cleaning where no great heights are involved; $2.50 to $2.75 per pane per side, this is for each piece of glass. A normal single pull up window has four sides...times....$.
As to how many people this will take is again relative as this work is a 'time' controlled situation. For example; how many apartments will you be cleaning at one time and for how long. By that I mean will you be called to clean 5 apartments one day and then two weeks later another 15 to 20 apartments?
What I would do is first determine exactly how long it will take to completely clean one apartment and the immediate hallway outside the apartment then extend your pricing. Don't forget the stairs, elevators, common areas, community areas, etc.
I would highly hope that you are incorporated and have liability insurance as this will only benefit you in many ways. I would also strongly suggest that if this work is in phase, that you come up with a 'sign off' sheet for an authority with the owner to date and sign off on as completed to their satisfaction as each phase is completed.
If this helped you please let me know and please get back to answer my question, thanks.