June 30 Fiscal year disadvantages?

[Kerry M.]

Hi. What are the disadvantages of having a fiscal year end June 30? This is our first year having an LLC (started in April) and the LLC owns a home to be later used as a rental. When getting the EIN, I listed June 30 as the end of our fiscal year.
So if the expenses of the first year count towards the property's basis, does the first year end 12 months from purchase or in the first fiscal year? So if the fiscal year ended Dec 31, would our basis would be larger?
Our expenses have been high, higher than the purchase price of 26K, because it was in poor condition and outside our local area. We travel back and forth with our large family to work on it. Our car repair costs have actually been higher than the mileage deduction would be.
So I am meeting with an accountant next week but don't know why he recommends changing the election to Dec 31. He said only one client of his does it in June.
I do well off season. For me it is much less stressful to think clearly, prepare for taxes and make major decisions in the summer being absent of major holidays. I find professionals easier to find, relaxed and more willing to spend time when I'm not in line with everyone else. I ask a lot of questions. The holidays for me are very time intensive and it takes a lot of prep work. I don't want to add finishing up a fiscal year and getting my numbers straight to make financial decisions on top of that.
So should I keep June 30th?