I don't know of a generator, but I have these good articles which I refer to:

Most popular real estate hashtags

Scientific guide to hashtags

yes & why would you need one? Can't you figure it out?

I want to state that I am tired of people using 20 hashtags for a post.

#Iamanidiothelpme

I never use hashtags!!

I use them but, I create my own.

What keywords are YOU trying to address?

A generator may not insert the ones that the reader would want OR ones that you would ever think of using.

social media is losing traction, I spend little marketing time there.

I am a skeptic regarding these irritating little vermin.

Some say they work, but most agree that they are annoying.

I choose not to use them.

No idea.  Not a huge fan of them, nor have I found them useful.

I've never heard of a hashtag generator.

Dave,

Have no idea.  We find them intrusive and boring. A

I don't use them but will be interested in the answers.

#no idea

I do not use too many hash-tags. Is it for IG? or AR?

I am a rank amateur.

Hashtag generator? Do they sell those at the hardware store

#hotmomma works for me.. lol (just kidding) Seriously try to use words like location, just listed etc.

It would not be me. I use them rarely. 

Beyond my paygrade! Parked and reading.

I have no idea. Share what you learn in a blog.

No , I check back to see answers 

I use those that relate to the post I am doing.

Have to see what otheres have to say.

Nothing a little googling and few minutes investigating the hashtags can't fix. 
Copy these in a note on your phone to keep handy, and paste them in each post to speed things up... especially if posts are similar. 

Think about the market you are trying to reach, as well as what hashtags actually have followers. 

I didnt know hashtag generators existed

and just so you know Hashtags do work

#TheyReallyDoWork

#KeepUpWIthTheYoungPeople!!!!

I just try & keep the #'s general. Cast a big net, ya know? No long #'s or irrelevant #'s.

No.

I didn't know there was such a thing.  I use them, but a maximum of 4... The "experts" I talked with, and whose classes I attended,  said you need a maximum of 4 hashtags to have any benefit.  I usually create my own around what I am posting that is most relevent.

What I have learned is to thhink like your client and poke around to find ones. People use them to jump around and find new and interesting suff, so they ARE useful for getting new eyes on your post.  Click on a simple one (#homes) and then look through posts and see ones that others include(#beachomes etc) . Use a mix of high volume tags (like #home which will see a lot of eyes quickly and then be gone) and lesser used ones (where you may be the top post and stick around or find small communities).