The biggest problem I ran into was attempting to remove a faulty power jack from a multi-layer motherboard using just a soldering iron. Can't be done without ruining the outside layer circuit traces. You need some way to heat both sides of the board and the vias to get through-hole parts removed without damaging the board. I might have been able to do it with a hot-air re-work soldering station, which is mandatory for removing smt components anyway, but I didn't have one and had to return the motherboard to its owner without repairing it. You have to be aware of your limitations in tools, skills, and experience. Re-work de-soldering stations start at around $200 and can go up to several thousand US dollars, depending on capabilities. You might be able to adapt a hot-air gun to the job, but you need some way to slow the air-flow or the smt parts will get blown away. I am looking into that for home projects, but so far no success. My hot-air gun is currently too unwieldy for the purpose. Maybe if I can find some sort of thermally insulated, small diameter hose to attach to the end it might work... maybe a braided-steel covered water hose wrapped in insulating tape would work. Have to be careful not to melt the rubber lining of the hose, so maybe Teflon tubing would be a better choice of material to use.
