What would a realistic plan for someone my age be? 

These properties were not distressed quite the opposite.. but they had 100k to 3 to 5 million of standing Timber on them that if we could purchase our Timber deed we could turn those trees to cash within 90 days..PS I had created a hand made custom data base of properties  10 acres or more not corporately owned that Aerial Photogramy show Standing Timber of an Age we deemed Merchantable. 

I am pretty sure this violates several federal anti trust laws as well. 

A Comprehensive Guide to Homebuying, it's essential to be thorough and methodical to ensure you're making an informed decision but draw boundaries, it's okay to open built-in closets and kitchen cabinets to assess the property, However, respect the seller's privacy by not invading their personal space, such as medicine cabinets, storage boxes, or clothing drawers,Interior:Architectural style.Bedroom and bathroom count, size, and location.Closet and storage space.Number of floors.Sightlines and general floorplan.Appliance age and condition.Light switches and socket count.Plumbing and water pressure.Natural light and views.Noise levels.Stairway width and type.Porches and decks.Garage and parking capacity.Proximity to neighboring homes.Remodeling opportunities.Exterior:Roof and siding condition.Landscaping and outdoor maintenance needs.Additional Considerations:Take notes and photos during the tour.Use your five senses to assess the home's condition.Ask your real estate agent questions about the home's features, flaws, and market conditions.Red Flags:Overly scented rooms.Water stains and damage.Lack of maintenance.Foundation issues.Sagging ceiling.Fresh paint that may be covering up issues.Final Tips:Be prepared to make multiple offers before finding the right home at the right price.Stick to your budget when making an offer.Don't overlook potential red flags just because you love a home.

Your $600 should be over $1200 a month if you split up that $500K over (2) properties (Outside of California) you could double up on your NOI.The age old question is out of state management - my reply is if its turn key or renovated it will need very little management other than lawn and once in a blue moon repair.

Yes, it's possible for an aging mobile home to be worth less than 40k. 

Age of tree of course plays into it.. when you look at for instance turn of the century ( after 1908 ) SF homes built with real 2x 4 redwood with trees that were 500 to 1000 years old its just stunning material..

One gave feedback that they didn't like it was 2-story due to her age and no feedback yet from the other showing.

Both moved in back in 1970s, so they are probably in their 70s of age now...Now, I understand that these tenants are "untouchable" in San Francisco, and your only hope is to wait until their pass (sorry to say that)..

My intention is not to boast but to inspire and share the significant impact that BiggerPockets, especially Joshua Dorkin and Brandon Turner, have had on my life.I first encountered BiggerPockets at 23 while enduring long 14+ hour days as a pipe fitter on hydroelectric dams in northern Manitoba, working 21 days on and 5 days off shift schedules.Although I was earning well for my age and educational background (I barely graduated high school), the job was unfulfilling and almost toxic, mainly because of the dynamics with the associates in the industry.