Real estate is a profession and needs to be approached as any other profession, that means some background in the basics of real estate, why RE is different than personal property, types of deeds, valuation approaches,  how and why the market reacts, understand zoning, and other aspects of the dirt you're trying to invest in, a house isn't just a truck load of shoes.You also need to understand the rules, regulations and laws, you don't need a law degree but you do need to be aware of business and real  estate laws.Best thing you might do is hook  up with   a real estate agent or broker, work for them, for free if necessary to learn what goes on, what the market is like and why ethical investors do what they do. 

Perhaps you are logical and I applaud you for being so, but most people react rather than think through things.

How do buyers react to a HML buyer vs cash buyer vs financed seller ?

I have a history of text messages showing that I immediately reacted to all complaints and sent a contractor to fix things.

Leverage is a good thing it helps you react faster it also increases the cost basis for the flip and reduces your taxable cap gain.

How will they react to that?

What questions would you ask and how would you react and respond given the same set of information and circumstances?

Yes, there will be challenges, but, you should be able to react to them and try to neutralize it or seek professional help in getting the problem resolved.Don't be overcome or paralyzed by fear and as FDR rightly said "The only thing we have to fear is fear itself"Now that you have made the move, below are some links that will help with the navigation of the site. http://www.biggerpockets.com/startherehttp://www.biggerpockets.com/meethttps://www.biggerpockets.com/alertsHow to Use @Mentions on BiggerPocketshttps://www.biggerpockets.com/ruleshttps://www.biggerpockets.com/termshttps://www.biggerpockets.com/inviteshttps://www.biggerpockets.com/perkshttps://www.biggerpockets.com/forums/categorieshttps://www.biggerpockets.com/courses/a-beginners-introduction-to-real-estate-investing (video courses)https://www.biggerpockets.com/real-estate-investing (Ultimate beginner's guide to REI)Before your 1st purchase, please ensure you visit the below link for some tips.https://www.biggerpockets.com/renewsblog/2014/12/19/real-estate-investing-success-smart-tips/REI books suggested by BPershttps://www.biggerpockets.com/renewsblog/2015/11/13/7-real-estate-books-beginner-investors/ (7 absolute must read books for beginner REIs)http://www.biggerpockets.com/renewsblog/2013/04/14/best-real-estate-books/?

Put in some low water plants that are native to your area....

Any beach town is going to have some homeless, but I think homeless in different areas act differently and I think it depends on how the police react.