There are tons of great DSCR brokers on BP but I would recommend getting in touch with an experienced broker who can quoted multiple options for you across all lending platforms.  

I think Columbus is a great option to consider.

I would speak with a lender and see what your options are - also they will be able to tell you exactly what you would need to do to be able to qualify. 

I heard that families with small kids prefer one story homes because of children safety, that is why I am not sure if investing in a two story home is a good option even if it may be a less expensive option.

Those seem to be in need, as there are very few 5+ bedroom options. 

Weigh ALL your options.  

There seem to be a market that attracts alot of travelers, is airbnb a good option here? 

It is a very stable and mature type of business IMHO.Frankly just providing the best service with a lot of options is the best way to succeed I think.Like @Andrew Steffens does.

You would have to explore other purchasing options like putting down a sizable down payment to bring down PP, ask the seller if he/she would be open to seller financing at a lower borrowing rate on all or some of the PP, work with a partner who could put up some of the money, etc...To provide a more simple resonse for this example, PP X CR = NOI.

Just trying to get an idea of what a hard money loan would look like in my case, and if it is a good option.