Am I being too conservative at 10%capex 10%repair&maintenance 10%property management and 10%vacancy.

I don't have any real estate experience but I do have a decade of management, customer service and sales experience.

Sadly, I don’t know any particular services that help you to compare rental property markets, I suspect other people can cover that.

It's a mix of 3 bed (8) and 1-2 bed (7) units, came 75% occupied and with a lot of deferred maintenance.

It is less likely someone is going to offer their services for free in terms of the time to do a walk through and cost estimate unless there's some incentive for them.

What to Look for in a Real Estate AgentWhen buying a home, you want a real estate agent who… Takes the time to understand your needs and goals, so you have a true partner in your home buying journey.Explains everything clearly and answers your questions, so you’re never in the dark.Has expertise and a track record of success in the local market.Knows how to find great properties in your price range.Will alert you to new listings, quickly, so you get the jump on those opportunities.Will advise you on the best price to offer for the home you want.Will prepare and present the offer, and skillfully negotiate such things as price, conditions, closing dates, etc. so you get the best deal.Will save you potentially thousands of dollars by ensuring you don’t overpay for the property you want.Will recommend reputable home inspectors, movers and other professionals you may need.Not every real estate agent offers all of these services.

Is it worth the maintenance and all the extra costs?

Don't forget to determine how much deferred maintenance there is - i.e., how much will you have to pay to keep the properties maintained when you first buy them or within the next few years. 

When I account for 10% vacancy, 10% repairs and maintenance, 10% CapEx and the numbers above I end up losing money every month.And I know I could argue that I don't need to account for capex/repairs and maintenance as it's completely rehabbed, but I have the understanding that the deal should cashflow anyways with that accounted for.

Is it worth the maintenance and all the extra costs?