Whether or not it will cause any issues depends on your financial status. If you are able to buy before selling and can afford to carry two mortgages, it should not cause you any problems. If you must sell your home in order to buy, it can be a bit more trickier as the biggest goal is just getting your current home sold out there.
As far as financing goes, there is many options out there to choose from currently and interest rates are great! Make sure you find a REALTOR in your area that knows your goals and will price and market your home to try and sell it and get you here to Troy.
If your hoping to look sooner than later in Troy and find something you like, you always have the option of writing a contingent contract upon the sale of your property in Las Vegas.
If you do not already have a REALTOR in Las Vegas and are struggling to find one you are happy with, Coldwell Banker Heritage Realtors in Troy can get you working with our Relocation department and help you find a REALTOR in your area and then assist you later on when your ready to start looking in Troy.
If you have any questions, please let me know! I'd be happy to help you however I can!