There might be other reasons for an increase as well. 

It's not that difficult. 

Working through an agent is difficult as they are on the market sometimes 3 days before we can go look at them. 

Given the "range", perhaps make your decision based on the percentage increase in gettable rent vs the percentage extra it's costing ie.

Hi everyone,I live in Hong Kong and just starting investing in Real Estate here.I have a very good lead, let me present it to you all.In a commercial building, the man own a office room high floor, he bought that office for investment for a year ago, he did not touch anything in the property and put it on the market for sale with a large markup.After a 9 months on the market he decided to lower the price, still after 4 month with the lower price no buyers.I then come in and ask the seller if he will consider owner finance on his property as he only have a small loan that is nearly paid.The owner said yes to owner financing and waiting for my offer.I have visited the property and understand why the landlord have not been able to rent or sale, the place was previously owned by a church, the all atmosphere and decoration is very much like a church... so really difficult to rent it as it is for office space or similar. 

If they don't meet our standards and/or don't want to pay the increased rent, onto the next.

The fact that I figured a way to increase my bottom line at no cost to you is my benefit .he cut me a check 

Finding cash flow is tricky given that low rates have increased many asset type price levels materially since 2009.

A lot of big cities have decent jobs growth but also have regularly increasing cost of living, which means there may be more people but they have less money than those earning the same salaries in secondary markets.

Therefore increasing your costs.