To date, the lack of disclosure and transparency to what is happening behind the scenes is the cause for my concern.Again, thank you all for your replies.

To date, I’ve been using dropbox and making notes, but I haven’t done the best job in the last few months of keeping up.So, my question is versus going back and trying to log conversations, am I just wasting my time?

So guess what, that day and age when people have limited information, limited resources, limited networks, the internet has ended that age.

how much income do you want by these dates?

He probably provided work worth 15k to date. 

My question is can I use my own standard lease form modified to reflect the major elements of the existing lease (assuming that the tenant is in agreement) or would I be better advised to keep the exact wording of the existing lease and just change the relevant names and dates?

If they don't need the cash, but need the time, then move back the closing date.

@Jerry PuckettI did see a funny song on the internet "All my Exes Changed Their Sexes."  

You can also ask your attorney to add a 'cover page' in the front of your lease on his letterhead stating these are the terms of the lease, you can sign the new lease by said due date or this is your 30 day notice'. 

When I've sued/evicted tenants it typically goes like this:-Go to the local magistrate and file the paperwork (and pay the filing fee)-They'll mail you the court date in the mail and a constable will serve the ex-tenant-You show up with your proof; there's a chance the defendant won't even show up and you'll receive a verdict-If the defendant doesn't pay the verdict you get a lien against him/her.