Well first off, having a foreign bank account is not that bad. The items that are needed to declare foreign accounts, FBAR (AKA FINCEN) and FATCA (Form 8938), are fortunately just reporting documents. You are not taxed on the amounts in these forms, you simply have to let the IRS and Treasury know of their existence.
Also, you only need to report the account if you have more than the minimum threshold in the accounts. For and FBAR form the threshold is 10K and for FATCA the threshold is over 200K (depending on your filing status). If the
total of your accounts does not exceed these thresholds, there is no need to report the accounts.
You will have to report any interest income on your 1040, but as these amounts are usually small, the difference is trivial.
As far as the mortgage is concerned, if your name is on the mortgage you will receive the same benefits you would if you purchased a home in the US (deduct interest, exclusion from capital gains, etc). As such, it may be beneficial to have your name on the mortgage. This article provides some good guidance on the matter:
http://www.crevelingandcreveling.com/blog-list/173-expat-americans-what-you-need-to-know-before-buying-a-home-overseas.htmlI hope this helps!