the divorce is straight forward and you can do it yourself quite easily however with regards finances you will need to see a solicitor as a Consent Order needs to be lodged at court to finalise financial matters.
re mortgage - you will have to ask the mortgage company to release H and they will look at your financial situation, ie whether they think you can meet the payments,
re rented house - who gets the income? what happens to that property/equity in the property at a future date?
courts prefer a clean break situation whereever possible, that there is no finances between you once the divorce is finalised. however, with properties etc charges can be placed on the property so that when a property is sold you can get a percentage or set amount of the equity.also any future mortgage you or H applies for will take into account your liability for the mortgage on the rented house.
debts - the court cannot order one person to pay another person's debt so if. so if you have£1000 on a credit card H does not legally have to pay towards it. it will, however, be included in the overall calculation of your assets.
if you want to minimise a solicitors involvement draw up an assets schedule.
this is a table listing you Assets, H's assets and those assets in joint names, then include debts in yours, H's and joint names.
deduct the debts from the assets and this will give you figures what each is worth and as a couple. (have evidence of your figures, ie bank statements etc) and each take a copy to a solicitor to discuss the best possible settlement. this will save a solicitor writing to request it and then putting together their own assets schedule