They are not difficult to accomplish when the time is right. ...1031 exchanges are a good thing to keep any appreciation invested in full (less some closing costs and Qualified Intermediary expenses), rather than having a cut of appreciation going into paying taxes.

You will need an intermediary to do the 1031 exchange, remember the rule about boot.If you unit is not sold and you think the agent can do that for you, go for it, make sure you disclose that it is going to be a 1031.I have done very well with exchanges and intend to do more, it is a great way to build a real estate portfolio without have to pay capital gains (deferred).Good luck, call if you need some more ideas.

The easiest way is to google search qualified intermediary in your area and talk with them. 

(Let me know if that wasn't very clear, people often get very confused about this rule).Since you'll have so much value to play with and are looking for cashflow investments, it's most likely you'll reinvest into multiple properties, or into a large MFR. 1031s have a lot of rules about replacement property identification and timing (which I'm happy to go into if you need a primer, but I'll leave for now) so you'll need to be well versed and have a good Qualified Intermediary in place long before you go to market if you elect to go this route.Given the value of your currently property, you have a million options for reinvestment, so you'll need plenty of research and vetting time before you pull the trigger on selling it.

@Benjamin Small, 1031s have to be performed under the direction of a qualified intermediary.  

Since most property managers don't have any skin in the game they don't bother to research what service providers are best and have the best value so see what how you can hold property managers accountable for being your intermediary or add performance measures into your agreement.

You also have to have a 3rd party qualified intermediary document that process and you cannot touch the proceeds in between the sale and purchase. 

Can I do a contract where he pays that amount to a qualified 1031 intermediary and for the remainder of the amount I want I do a seller finance note secured by a second mortgage on the property? 

I would call a 1031 intermediary about this.

You need to talk to a qualified intermediary before you do anything.