Need HVAC / heating install

[Sherwin Vargas]

Looking for recomendations for a heating system from a 3rd floor apartment. No prior heating system, there is a gas line that passes through the attic. 

Was told forced hot air unit in attic could be most cost effective option. 

Hava called a few companies some dont answer back and others quoting 10k plus. Willing to consider baseboard just looking for cheapest option for rental. 

 House is located in providence. 

Thank you