After this, it`s their responsibly. but again, who will pay this work/storage?

I also suspect he is using the tax's to wiggle out of the deal if you were responsible for the tax's i would pay them pronto so he can't default you.YOu can for sure lawyer up as it may come to that to get the seller to respond.. but again seller may not have the means .. then what  ???

There were also complaints about alleged slow or nonexistent responses to email questions and communications.

If you provide it you are responsible to repair it, the fact that the washer and dryer were there when they moved in would lead me to lean towards a you should provide laundry services answer, however you may want to switch out to coin laundry or submeter the water for the future anyway.

@Tom Gimer thanks for the response.

In multi-unit property lawn care is typically a landlord responsibility. 

Thanks @Logan Allec for the quick response.

You already have a tenant who is demonstrating responsibility, so it is more assessing the risk of the person moving in.

You accountant should know how much equity you have in the property and can help guide you but you can do the following:1)  Sell and do a 1031 exchange to delay any gains tax.2)  Sell on land contract to an owner occupant- they would be responsible for maintenance (Maybe include a home warranty with the sale) and you no longer have to pay a property manager. 

Definitely looking forward to other's responses to this.