Should I do 6 months lease

[Xin Z.]

Hi all,

I posted my rental property on craigslist for several weeks now without a good potential tenant.  Now a prospect contacted for a 6 months lease.  The reason is they are building their house right now and planned to move in 6 months. 

Would you allow 6 months tenant in this case?  Although this is not winter time, I feel like after schools start, the interests on my rental have been much less.  If I can move on with this tenant, usually what is a reasonable premium on top of normal rent per month?

Thanks so much!