Are there any other services or amenities that we can provide to tenants in a rent by the room strategy that you have found are really helpful in providing a great experience for the tenant and at the same time don't break the bank?

I'm not sure the percent that prohibits them but I would guess it to be over 50%.I think $450 is very high but it depends on the amenities. 

Amenities like a kitchen (usually for larger groups or longer stays.)

I've listed about $100 -$150 under nearby complexes which have additional amenities, but there a very few to no comparable 2/3 family homes to base off of.I was originally planning to list at least $100 more, but I have 5 straight weeks of travel upcoming and if I didn't get it rented for May 1st, I have at least a month of vacancy.

You are right by Crown Center and many other amenities.

Ken LashinGranoff EnterprisesPurchasers of Future Cash Flows Amen, Ken. 

Yes, in my market (Baltimore) there is high demand for old buildings that retain their historic elements and also include modern amenities (nice kitchens and baths, updated electric, etc.)However, this depends on the income level of the neighborhood. 

Is the city just becoming more amenable to new development in the area, or is it something more?

Hotels are generally in areas zoned with other amenities your customers will need.

So, it is important when contemplating the purchase of a specific home that you also evaluate the neighborhood to ensure that it meets the standards and has the amenities that you expect.