I am looking for any information you may have like books or websites, or maybe even seminars you'd recommend?

I would recommend reading the books first before doing any seminars.

But the most appealing feature is they are replacing everything thus hopefully eliminating maintenance cost for a few years.

My thought is to walk toward the best selling feature of the house (usually the kitchen) if it's close to the entrance, then let the tenant (or buyer) pick the route unless they come off like they would like to defer to you.

Then we can check the safety features of the heater and make sure the tenant is using it properly.

So if they also make you do that every three months, then I think that feature alone would make me choose to never use them.

I was a poor carpenter in 1989, renting an apartment in Redwood City CA, when I received a mailer inviting me to a Robert Allen seminar.

If agents in your area host "Brokers Open Houses" (open houses for brokers, not for the public), attend as many of these as possible.You'll get to know property styles, features and be better able to understand local pricing.You should also practice running comps on different properties, so you'll be more ready when you need to do one for a client.Best of luck!

I am a newcomer to BiggerPockets, but have had exposure to other real estate investing seminars.  

The seminar was specifically designed for non-profits to understand the qualification, vetting and auction process for HUD sales along with the management requirements if you are a winning bidder.