It takes a really good project manager as you really have to have everyone on task since there are so many moving parts.

Your price range is great and gives you a lot of options.So first task in deciding on a market- look at what each offerings and see if any of them strike more interest than another.

If I'm doing floors, countertops, painting (int and ext), installing cabinet hardware and etc then I buy all the materials for those specific tasks and I get the green light when to get those tasks completed ASAP.  

Best property management software for this task?

It may sound like and easy task but one that is overlooked.

Which if any of the tasks below might involve significant health/legal/financial repercussions due to lead or asbestos in the materials:  Sanding down the wood floorsDemoing the bathroomDemoing the kitchenReplacing paneled walls with sheetrockReplacing the flooring in the kitchenOpening up two passagewaysSoffit repair

However, there's no harm in multi-tasking either. 

Also feel free to ask me any questions you may have about building maintenance or the daily tasks of a building or its maintenance crew.

Thanks all for your informative responses, so besides tasks with physical nature what kind of office work tasks that consume much of a Landlord precious time? 

Tenants know that they can skip paying the rent for months with little risk of being evicted; the incentive to pay the rent in California (and places with similar anti-landlord legislation) is very weak.