If you don't want to spend any money you can use propstream.com and other free trials(a lot of lead generation sites have)and write down as many leads as you can get.After that skip trace using truepeoplesearch.com and get to calling for some leads. This has been surprisingly accurate and generated me a couple leads . You just have to be driven and consistent and know how to cold call.
If you have a little bit of money I would buy a quality list from lets say list source or another good site.
And market like crazy using direct mail, RVM, Faceook/instagram Ads everything.
$50 for a list on list source free to coldcall your list and find a cheap marketing method that works for you