Congratulations on saving up $75,000. That requires discipline and tenacity. There are a lot of factors that would go into making your decision.
First and foremost is the security of the income stream you have now. Being leveraged during times of hardship is not a pleasant experience. Unexpected job losses can and do happen. Only you can determine how secure your and your spouse's situation is.
Second, I would consider the job market in the location that you live. If you live in a small town it will be hard to find income levels like you have now. Rental properties are additional ties to an area. Are you happy in the area in which you live? If you were laid off are there opportunities in the same area. Being a long distance landlord is again not a pleasant experience. I can throw being forced to sell to relocate at a reduced price into this same bucket.
Third, you need to have 3 to 6 months of expenses saved for emergencies. This is in addition to having no consumer debt (credit cards, car loans, student loans). $75,000 feels like a lot. Life can throw you curve balls. You need to be prepared for them because of the fundamental nature of Murphy's Law. If you were to be a landlord you should err closer to the six month end of the scale. I own two rentals and can speak to people being late a given month, heating and air problems, plumbing issues, washers and dryers breaking, weather related issues, and even a tenant leaving behind for truckloads of trash. Over 20 years I guess I have seen it all. A rental agency will only act as a minor buffer.
Fourth, your family situation is important. I personally save 10% of my income for my child's education. If you haven't started doing so or have different feelings on what you might contribute think about it before any financial move.
Fifth, any mortgage payment you are making should be 25% or less than your take home pay for a 15 year fixed rate mortgage. Anything less than 20% down and you start burning up money on PMI insurance. 'House Poor' is a term for people that make high incomes but have too much being spent for housing. It is the cause of a lot of financial stress.
Sixth, you need to save for retirement. The absolute minimum I recommend is 15% of your income. Even if the match is 6% you should invest the full 15% making it 21%. Social Security is a scary thing and depending on it is not wise. I think your income still qualifies you for contributions to a Roth IRA. If you aren't personally contributing 15% do so before making a move.
There is an old joke that homeless people who have a 0 net worth often are richer than people driving fancy cars and living in fancy houses. Ultimately no one can tell you the right answer. Every situation is unique. You have a complex tapestry to your financial life that no else one knows.