The bankruptcy process in Northern Ireland is broadly similar to Scotland, England & Wales, given that it is based on the Insolvency Act 1986 and the Enterprise Act 2002. However, there are subtle differances in procedures and costs. For example, the court costs for self adjudicating bankruptcy in Scotland are only £200, but €640 in Northern Ireland.
Of the three differant jurisdictions, Northern Ireland is the most rigorous in its examination of ROI individuals, with a detailed review of bank statements to identify locations of ATM withdrawels etc so that the court is satisfied that individuals have actually moved to Nothern Ireland.
if you are self employed, you could incorporate a company in Northern Ireland that could then employ you to carry out work, including work in the ROI. Having said that, you should first try and do a deal with your lending institutions.
Jim Stafford