450 Euro/month should be enough.
Mozambique is considered to have a low living cost
The Expat Arrivals page on living costs in Mozambique should give you some idea.
Note that it'll be too expensive to live on your own and eating out in Mozambique can be pricey, so you'll have to save money where you can.
Which area in Maputo would you like to live in?
Do you have people that you can live with?
Expat Health Insurance
Cigna Global Health Insurance.
Medical insurance specifically designed for expats. With Cigna, you won't have to rely on foreign public health care systems, which may not meet your needs. Cigna allows you to speak to a doctor on demand, for consultations or instant advice, wherever you are in the world. They also offer full cancer care across all levels of cover, and settle the cost of treatments directly with the provider.
International Movers. Get Quotes. Compare Prices.
Sirelo has a network of more than 500 international removal companies that can move your furniture and possessions to your new home. By filling in a form, you’ll get up to 5 quotes from recommended movers. This service is free of charge and will help you select an international moving company that suits your needs and budget.