Hi Lookintwo,
Decisions, decisions........Damned if you do Damned if you don't............
I understand your 'dilemma', but you really only have a couple of options when it comes down to it. By choosing to keep your current home AND buy a new one, you will have to qualify on paper to carry the current loan, the equity line loan (if that is what you do to get the down payment for the new home) AND the new homes' mortgage, taxes and insurance. Today's guide lines will not give you the rent collected on your current home as part of the equation. You need to be a landlord for 2 yrs and claim rental income on a sch. E to have the rents counted as part of your income. Please keep this in mind. You can maybe find a Heloc (Home Equity Line of Credit) to 90% but more likely only 85% of the current value. So, if your home is worth $450K you can maybe get out $175K if you only owe around $200K now. This loan is based on the prime rate plus a fixed margin and it may be low now but it will certainly go up. If you chose to do a fixed 2nd mtg the rates are up near 7% and this payment will shock you. The other option would be just a new 30 yr fixed and a cash out refinance to 75%LTV. This would get you about $135K, but certainly be a lower payment than a new 2nd in the long run.
I am going to stick with my original suggestion if you are set on the $1M home: Get your current home ready to sell, get rid of the 'junk', you don't need it and it will actually refresh you to unload it, trust me. If you have items you haven't 'touched' in over 2 yrs, e-bay them away. You already said you don't want to be a landlord and I have been one for years and it is not 'fun', it's a second job - full time, you need to commit to it. Now if you can carry all the mortgages comfortably, well then you can go for it too, but make sure you are 'comfortable' as in you have no renter for 3-4 mos at times.
My other suggestion may actually be the best for you both. Take cash out and totally, totally gut rehab/add on to your current home and make IT the dream home. This will save you huge, huge dollars, and if you love your neighborhood you will not be 'leaving' friends and neighbors. You could probably make your current home unbelievable for $150-175K and have all the bells and whistles and end up with half the mortgage you would take on with a $800K purchase. Go rent a home or apartment for 6 mos and don't even live in the home during construction. This way you can unload the 'junk', pick all the dream finishes your wife wants and colors and when it's done, move back 'home' to a brand new place with no 'junk' in it. Start watching HGTV.
Now if you just want out of this home period the end, then this doesn't work, but I think you owe it to yourself to have an architect come over and see what they can 'vision' for you. This way you will have a smaller mortgage and be set up for a far better retirement and also probably double the value of your home at the same time.
My two cents!
Call with any questions and enjoy your weekend!
Dan
312-952-8068