You can pull lead sources from craigslist ads, the MLS and listsource since you're in the US.

OR, do I do what makes me FEEL more comfortable because it’s familiar; and rent out my house, buy a bigger more expensive house that has potential to rent out a little casita that’s attached to the house for added income?

Use Google for some definitions.

Do a google search and you'll find lots of options

You can probably partner up with someone who will bring money for the repairs and 50/50 the added profit.

Sure you can post ads online and make signs but it’s active calling that’s most effective.I’d make a marketing piece about your space then start calling.

Google that term and you can read about how it can help you.I own a couple properties in flood zones, no a show stopper for me but proceed with caution. obviously house should be discounted when sold if in the flood zone but if you can get it at a deep discount with potential of removing it that could be a home run!!

This would eliminate that benefit, give it the added risk of warping, cracking & peeling, and add more maintenance. 

  $1k or $2k here and there can really ad up. 

We're considering adding a tenant at our own home and refi'ing our duplex very soon.