If you determine that the numbers look good, make sure to check other sites to see if the comparable property is on multiple sites that may add to the numbers.  

One of the biggest challenges for everyone involved is being on the same page about the actual time required for maintenance.DIY landlords rarely properly track their time when it comes to property management in general - tracking their true time invested in maintenance is where they perform the worst.Investors that hire PMCs are rarely any better at understanding the true amount of time maintenance takes.

Is there any good resource with links to the relevant sites in particular states/counties?

I'm on a call now and they same decent and honest, but some reviews on here and other sites are a bit concerning.

In fact, someone just called me last week and had a non-performing rental package that they purchased in the same fashion and the prices they bought at, considering the actual condition and historical performance of the properties was too high in my opinion. 

I also handle any inspections needed before the opening of a site.

The site has changed tremendously. 

Please, those who have already done wholesale, answer whether the chain of actions that WHOLESALER should perform is correct or not, maybe there is no need to do some steps or actions at all, please explain me those who have already done wholesale, thank you very much.

So now you are throwing good money after bad probably without a guarantee of any actual performance of the company until much later down the line.  

I am perfectly fine holding X amount in real estate.If I do see an opportunity another option is to lock it up and sell one of my existing if I think this property will perform or appreciate significantly more.