As a result, one of my units had a record-breaking early season, which should help me carry it through the rest of the year - hopefully keeping it break-even at least.

As part of his letter to confirm the move out date, he specifically mentioned that he is waiving rights to part of the security deposit as they are breaking the lease.My tenant also helped with showing the home to prospective tenants and finally, I approved one of them after the background check and all.Now, he is coming back and saying that he spoke to a lawyer and I should return the security deposit as I rented the house to a new tenant right away.

They just started a moratorium on evictions, so I really wouldn't want good tenants decide that they're ok with the eviction, because it's an unusual situation and they can explain it to future landlords (I do think that many landlords, who normally don't accept evictions, will likely be more accepting on evictions in this time period, because all of this was unexpected).And I don't want them to break the lease and move back in with relatives.

I chose Vegas because I think it was a growing market, plus I like going there myself so was looking at a little tax break by writing off visits to Vegas as I check on the property and work with the local team.

We would be lucky to break even if we sell.

How do you go about such an incident? Thanks friends

Some sellers like cash offers over loan offers, but it's usually a "break the tie" type of thing or perhaps go with a slightly lower offer. 

Send him an eviction letter for breaking the lease of non payment, if dont know what to do get a lawyer on it now.

Unless your property hasn’t been maintained and something is always breaking it’s fairly simple.  

I currently have some debt that is holding me back from saving to invest, so finding ways to break into the market with lower cash down/OPM is my current goal in finding my first property.