Financial talk

I have two kids from my previous marriage and me and my husband have been together for 3 years and married for 1 coming this sunday.i have a 5 year old and a 3 year old that will be 4 in may. i want one more child very soon since I dont want my two to be too far apart in age. my kids that are a little over a year apart are best friends and they totally love each other. my husband says he wants to wait about 6 more months so he can take parenting classes to learn how to be a better parent and step parent and he is worried about money. I have been in beauty school for a year and half and i just fecently graduated and passed my test and will start working here in about 2 weeks. I dont understand why he doesnt agree to have my iud taken out now and start since it will take atleast a month before i can get pregnant any way and also i will be pregnant for a whole 9 months and that is plenty of time to take a 6 week class and i already have a job lined up so why is he so aginst it he wants a kid badly with me but he doesnt have kid sof his own and i think that he is worried to have a kid of his own since he came from a kinda messed up family and doesnt want his kid to do the same but we have tlaked about how it is how you raise the child not the past family lifes i have a IUD the paraguard its the copper one without hormones and i have been told and read that it will take most likely 2-6 months after taken out the become pregnany but lots of times even longer thats why i want it out now. he does not have kids of his own and my two live with there dad i gave his majority custody he is in bad health and will not be on earth with us for much longer and i wnat my kids to know their dad so i let them stay with him but we see them very often so he cant say its cause child care for three cause it wouldjust be child care for 1 and i have someone that is a child care provider i very much trust for 20 a day that lives down the street that i have know for years