It depends on a lot of factors. People considering aliyah need to do two things: (1) make sure you speak passable Hebrew BEFORE coming so that ulpan has a chance of lifting you into at least basic fluency (if you come without significant Hebrew skills, you will be placed in ulpan aleph and you will come out not much more illiterate than you were to begin with), and (2) make sure you secure an American source of parnassah for at least the first years (whether commuting or preferably something you can do online).
Aside from high tech or physicians salaries, which may have potential as much as a third to half what they would be in the U.S., most jobs will be more like 1/4 the earning potential. With the cost of real estate (which is in many cases comparable to what you would pay in the tristate area–in Jerusalem for sure, you cannot purchase a three-bedroom apartment for less than half a million dollars for the smallest, simplest place), if you are not able to purchase an apartment upon arriving, you will probably never own one (we are here 12 years and have no hope of ever getting out of the unpleasant and expensive world of renting).
Keep in mind that the economic and communication challenges will be a shock and can put significant stress on your shalom bayis (if you cannot afford shoes or food for your kids, you can’t imagine what that does to you). It is true that in some ways a Jew feels “at home” here more than anywhere else, but there are other ways in which you will never ever feel at home here–there are significant cultural differences.
Note that most charedi schools will see your family as a liability. Unless you have serious yichus or serious money, chinuch atzmai schools may hesitate to bring in Americans who might taint their institution. In shidduchim as well, especially if you are baalei teshuvah, be aware an American family will likely be seen as damaged goods.
There are definitely amazing things about being here, and perhaps you will be lucky and your children will thrive (our oldest went off the derech and some of the younger ones are showing signs of following suit). One can never know how things would have turned out had one stayed in the “old country.” I will say my kids are not mired in pop culture like Americans are, they are not materialistic at all, and they have in many ways grown up in a very wholesome environment. They are also fully trilingual (Hebrew and Yiddish in addition to English), which is amazing.
Be aware however that while going through challenges such as being taken advantage of in financial transactions, falling afoul of the legal system in one way or another, and other things that are liable to happen to olim who do not have good Hebrew nor protektzia, it can be difficult to feel the full benefit of what is in many (but not necessarily all) ways a more wholesome spiritual environment.
Think long and hard. Seek daas Torah. It is not pashut.
Hatzlacha rabba.