Would you recommend self-marketing strategies (i.e. solicite clients for myself) OR work with someone to do the marketing and scheduling for me?

I provide various services that include:
1. Mobile Car detailing (focus is interior but will do exterior)
2. house washing with a chemical scrub and power washer
3. power washing and sanitizing trash bins and Dumpsters
4. lawn care and landscaping (mowing weed eating, tree trimming, and large debris)
5. general handyman tasks (lightbulbs, assemblies, paint touch up, etc)
6. General in-home cleaning & hoarder clean outside
6. Virtual (via email) personal training & Fitness education

My pricing isn't an issue, if anything its quite a deal. And I have found success at finding a couple clients here and there but my weakness is generating new clientele. So much to the point, I'd almost rather just partner up with someone to find the clients. Basically give a percentage to find/ book them and I do the work.
And, if I were to partner with someone, where do I look that would yield beneficial results?
But I know adding more persons will cut into some of my revenue.

So. What would you recommend?