1.) Edgewater/East Lakewood is a hard area to classify in one short summary. There are very large apartment buildings right on the lake in the area called the "gold coast", some very expensive townhomes in the trendy area of W 117th, some "older money" homes on Clifton, and some cheaper homes as you get more South, and Edgewater can be street by street in that you'll have homes that are owned by people in their 60s+ that are kept in great shape where the street over is basically an alley with homes that are in need of some love. Feet on the ground can be a game changer in all of these scenarios.
2.) Depends what you're trying to get out of it. Cleveland as a whole is not known for appreciation, but Lakewood, Ohio City, Tremont and similar spots can see higher appreciation than other areas of it. If you're buying for cashflow, you can do better in cheaper areas but you'll have more headaches. Lakewood in particular doesn't see as much problems as a whole, so lower cashflow may mean less money on repairs and finding tenants. Market rents vary greatly, as stated in #1, but Lakewood is "more expensive" market rent as a whole.
3.) Find a good PM, and if they're good themselves, they'll know good people. I've heard it said that as an out of state investor, you want to find a good PM as much as you do a good deal.
4.) Honestly, too new to the game to tell you this. Sorry. I'm sure others' advice is better said here.
5.) Same as said in #5.
You're welcome to reach out for anything else. Thanks!